[Solved] Adding a Context Menu to a tree view item dynamically?

[donnfelker]

Has anyone added a context menu to a treeview item dynamically?

I only want to add the context menu if the item is of a certain type. I'm currently working with the ItemPrepared event.
Like this:

 private void RuleTree_ItemPrepared(object sender, Telerik.Windows.Controls.RadTreeViewItemPreparedEventArgs e)
{
    if (e.PreparedItem.Item is theTypeThatImLookingFor)
    {
        // Add an icon.
        e.PreparedItem.DefaultImageSrc = "../../Resources/Icons/add.png";

        // Build menu
        RadContextMenu menu = new RadContextMenu();
        menu.EventName = "MouseLeftButtonDown";

        foreach (var name in EnumExtensions.GetNames(typeof (AnEnumeration)))
        {
            RadMenuItem menuItem = new RadMenuItem
                                       {
                                           Header = name.ToString(),
                                       };
            menuItem.Click += OnContextClick;
            menu.Items.Add(menuItem);
        }

        // TODO: Figure out how to add menu to RadTreeViewItem
    }
}

How do I add the context menu to the tree view item? I havent found any examples and it isnt exactly obvious (IMO). Thanks!

[Ivan]

Hi donnfelker,

Thank you for contacting Telerik Support.

Please try the code below:

private void RuleTree_ItemPrepared(
   object sender,
   Telerik.Windows.Controls.RadTreeViewItemPreparedEventArgs e)
{
   RadContextMenu menu = new RadContextMenu();

   menu.EventName = "MouseLeftButtonUp";
   menu.ModifierKey = ModifierKeys.Control;

   menu.Items.Add(new RadMenuItem() { Header = "item 1" });
   menu.Items.Add(new RadMenuItem() { Header = "item 2" });
   menu.Items.Add(new RadMenuItem() { Header = "item 3" });

   RadContextMenu.SetContextMenu(sender as FrameworkElement, menu);
}

Please note there are some limitations with the MouseButtonDown in the TreeView so please use the button's UP event.

Let me know if there are other questions.

Regards,
Ivan
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[shai]

Hi
I added the below code to mine and i registered to the ItemPrepared event but i still cant see the context menu
any advice??

you have very freindly Great controls 
Thanx 

[Ivan]

Hello shai,

Please note that we are using the mouse's Up event because there are some limitations with the Down event. If you hook on the Down event, nothing will happen.

The other point you should be aware of - in the code bellow we filtered the menu to show only when the Control key is pressed.

If nothing of the above helps please send us a sample application for further investigation.

Regards,
Ivan
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.